<!DOCTYPE html>
<html class=reftest-wait>
<title>Basic hierarchy of view-transition-group</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">
<link rel="match" href="nested-ref.html">
<meta name=fuzzy content="maxDifference=0-255; totalPixels=0-515">
<script src="/common/reftest-wait.js"></script>
<style>
    body {
        margin: 0;
    }
    main {
        view-transition-name: main;
    }

    section {
        view-transition-name: section;
        view-transition-group: main;
    }

    ::view-transition,
    ::view-transition-group(*),
    section,
    main {
        background: red;
        inset: 0;
        position: absolute;
    }

    ::view-transition-group(main) {
        background: green;
    }
    ::view-transition-group(section) {
        background: inherit;
        transform: none !important;
    }
    ::view-transition-image-pair(*),
    ::view-transition-old(*),
    ::view-transition-new(*)
     {
        display: none;
    }
</style>
<body>
    <main>
        <section>
            Hello
        </section>
    </main>
<script>
failIfNot(document.startViewTransition, "Missing document.startViewTransition");

async function runTest() {
  let transition = document.startViewTransition();
  transition.ready.then(() => takeScreenshot());
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>
</body>